Statistical models to predict fresh and hardened properties of self-consolidating concrete

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• 作者：Wu-Jian Long (1) alainens@hotmail.com
  Guillaume Lemieux (2)
  Soo-Duck Hwang (2)
  Kamal Henri Khayat (2) Kamal.Khayat@USherbrooke.ca
• 关键词：Self ; consolidating concrete &#8211 ; Statistical models &#8211 ; Fresh properties &#8211 ; Mechanical properties &#8211 ; Visco ; elastic properties
• 刊名：Materials and Structures
• 出版年：2012
• 出版时间：July 2012
• 年：2012
• 卷：45
• 期：7
• 页码：1035-1052
• 全文大小：623.8 KB
• 参考文献：1. ACI Committee 237 (2007) Self-consolidating concrete (ACI 237R-07), American Concrete Institute, Farmington Hills, MI, pp 30
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  5. Naito C, Hoover M (2005) Applicability of self-consolidating concrete for use in precast bridge beam construction. In: Proceedings of the combining the second North American conference on the design and use of self-consolidating concrete and the fourth international RILEM symposium on self-compacting concrete, Session E-3, Chicago, USA
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• 作者单位：1. Department of Civil Engineering, Shenzhen University, 3688 Nanhai Ave, Shenzhen, 518060 Guangdong, China2. Universit茅 de Sherbrooke, 2500 Blvd. Universit茅, Sherbrooke, QC J1K 2R1, Canada
• 刊物类别：Engineering
• 刊物主题：Structural Mechanics
  Theoretical and Applied Mechanics
  Mechanical Engineering
  Operating Procedures and Materials Treatment
  Civil Engineering
  Building Materials
  
• 出版者：Springer Netherlands
• ISSN：1871-6873

文摘

Several material properties and mix design parameters affect the performance of self-consolidating concrete (SCC) and need to be taken into consideration to enhance the fresh and hardened properties of the concrete. A factorial design was conducted to model the effect of mixture parameters and material properties on workability, mechanical properties, and visco-elastic properties of SCC used for the construction of precast/prestressed structural elements. The modeled mixture parameters included the binder content, binder type, water-to-cementitious materials ratio, sand-to-total aggregate ratio (S/A), and dosage of thickening-type viscosity-modifying admixture. In total, 16 SCC mixtures were investigated to establish a factorial design with five main factors. Three replicate SCC mixtures were prepared to estimate the degree of the experimental error for the modeled responses. The mixtures were evaluated to determine several key responses that affect the performance of precast, prestressed concrete, including the filling ability, passing ability, filling capacity, stability, compressive strength, modulus of elasticity, flexural strength, autogenous shrinkage, drying shrinkage, and creep. The derived statistical models enable to quantify the level of significance of each of the five investigated parameters on fresh and hardened properties of SCC, which can simplify the test protocol needed to optimize SCC. Based on the results derived from the factorial design, recommendations for the proportioning of SCC in terms of workability, mechanical properties, and visco-elastic properties are given.